采用电化学噪声技术监测2205钢在0.05 mol·L-1HCl+6％ FeCl3溶液中的点腐蚀行为.从电化学噪声的时域和频域分析以及腐蚀形貌观察等方面研究了2205钢的点蚀过程.结果表明:根据电化学噪声时域谱中噪声峰的特征,其点蚀形成过程可大致分为4个阶段.电流标准偏差S1、噪声电阻Rn以及电流功率谱密度曲线倾斜部分的斜率KI均能表征点蚀发展的剧烈程度.%The pitting corrosion behavior of 2205 steel in 0.05 mol · L-1 HCl+ 6％ FeCl3 · 6H2O solution was characterized by electrochemical noise (EN) analysis technique.The corrosion processes for the steel were studied in detail by analyzing time-domain and frequency-domain characteristics of electrochemical noise together with the observation of corrosion morphology.The whole process can be divided into four steps,which can be differentiated clearly according to the characteristic EN transient peaks.It was found that the current standard deviation &,noise resistance Rn and the slope of the current power spectrum density KI can reflect the corrosion intensity.
展开▼
